N42 or E88 Head for L28 build

[satrat z]

Hey guys,

I am wanting to build an L28 motor for my 240, it has an E88 head fitted on an L26 block at the moment ,with a mild port job, cam etc already carried out , when I go over the previous posts re head builds it seems that the most popular one mentioned is the N42 , is there any reason for this or is my E88 a good starting point as it already has most of the work done.

It will be going onto an L28 block running around 10.5:1 compression and triple 45mm webers.

Thanks for the advice.

[dat2kman]

Stick with the e88, you know it's history, it has had a bit spent on it, hasnt cooked or gone soft? Still nice and straight?

May need a touch of port matching for the triple intake manifold.

You could consider 40 or 42's for better midrange daily driver driveability, the 45's may give you a little stumble in low to mid range due to lowish velocity airspeed due to larger size, but you'll have great tp end!

[satrat z]

Thanks for the reply dat2kman, Yes the head work was done recently in Brisbane before I bought the car and is still in good condition.

I have just purchased the webers and have put 34mm chokes in to hopefully smooth out the lower rpm, haven't fitted the webers yet so will no doubt need to do some re jettingto suit.

The inlet manifold is a redline, unfortunately I wasn't able to find an inlet manifold that allowed a bit more throat size for match porting to the head but will see how it goes initially.

[chris240]

personally I'd prefer the n42,all things being equal,  but as youve already had some work done (as mentioned) to the E88 its a no brainer.

 

[SS30RR]

You could consider 40 or 42's for better midrange daily driver driveability, the 45's may give you a little stumble in low to mid range due to lowish velocity airspeed due to larger size, but you'll have great tp end!

 

Interesting.....I didn't think Stewart Wilkins would not have set up my webbers properly......after all I told them it'll be a dedicated track car.